PVH Corp., the owner of the Tommy Hilfiger brand, agreed to buy Warnaco Group Inc. in a $2.9 billion transaction, bringing all Calvin Klein-branded apparel under one roof in the largest clothing-industry deal announced in 2012.

The DJ put on Katy Perry , and John Paulson , president of Paulson & Co., and his wife, Jenny, danced with friends. It was the final hour of New York City Ballet ’s Spring Gala, and the 850 guests were letting loose.